摘要
采用N2静态吸附法和IR光谱法研究了高岭土原位晶化合成Y型沸石过程中的孔结构和沸石的形成过程。结果显示,在原位晶化过程中,从天然高岭土到晶化产物,孔结构发生了很大的变化,从大孔到中孔发达的过程,焙烧微球在碱溶液的作用下,形成了发达的孔道结构,进而在孔道的可接近表面上均匀地生长出了Y型沸石;原位晶化过程是焙烧微球在液相组分中先转变为硅铝酸钠凝胶,随后硅铝酸钠凝胶逐步地转变为Y型沸石。
The pore structure and the process of in - situ crystallization of zeolite Y prepared from kaolin are investigated by N2 static adsorption and IR spectrum method. The results show that in the process of in -situ crystallization, the pore structure has changed greatly from raw kaolin to crystallized product and the mesoporous structure of the roasted kaolin particle is formed under the action of alkaline solution. The zeolite Y is formed uniformly on the surface along with the pore walls. The process of in - situ crystallization is that the roasted microparticles in the liquid phase convert into sodium silicoaluminate gel first and then the gels convert into zeolite Y gradually.
出处
《无机盐工业》
CAS
北大核心
2006年第1期26-28,共3页
Inorganic Chemicals Industry
关键词
高岭土
原位晶化
催化复合材料
孔结构
N2静态吸附法
IR光谱法
kaolin
in - situ crystallization
catalytic composite material
pore structure
N2 static adsorption
IR spectrum method
